ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Exposed dentine with patent tubules allows the movement of the tubule fluid leading to dentinesensitivity. An occlusion of patent dentinal tubules can effectively reduce the state of dentinehypersensitivity. Strontium chloride (SrCl2) has been known as a representative component of adesensitizing dentifrice. Recently, a desensitizing dentifrice containing nano-sized CarbonatedApatites (n-CAPs) was released onto the market. The aim of this in vitro study was to evaluate theocclusion effects of dentinal tubules in dentifrices containing several concentrations of the n-CAPs.One hundred human dentine specimens were embedded into a Teflon mold and ground withsilicone carbide papers to expose the dentin surface. The dentin surface was etched with 37%phosphoric acid for 60 seconds and washed ultrasonically for 1 hour. The dentifrices were classifiedinto five groups: experimental dentifrices Group 1: n-CAPs 5%, group 2: n-CAPs 15%, group 3: n-CAPs 0% and group 4: n-CAPs 30%, and the control dentifrice group 5: SrCl2 10%. The dentifriceslurries were prepared as 20 grams of dentifrice in 80 ml of distilled water. Fifty specimens werebrushed with the dentifrice slurries using a V8 Cross Brushing Machine. Tooth brushing wasperformed 5,000 times using a back-and–forth stroke. Images showing the sizes of the dentinaltubules were taken by scanning electron microscopy (×3000) and the changes in the tubule sizeswere analyzed using a digital analyzer. The n-CAPs used in this study had a high solubility andaffinity to bone minerals. In addition, the n-CAPs were well deposited on patent dentinal tubules.The group 1 dentifrice (n-CAPs 5% and silica 25%) showed the highest dentinal tubule occlusion,and there was a statistically significant difference between group 4 and the control (p〈0.05). Overall,the dentifrice containing 5% nano carbonated apatite and 25% silica is the most effective inoccluding dentinal tubules
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.342-343.821.pdf
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